EP 1122625 B1 20050202 - Field based process control system with auto-tuning
Title (en)
Field based process control system with auto-tuning
Title (de)
Feldgerät basiertes Prozesssteuersystem mit automatischer Abstimmung
Title (fr)
Système de régulation de processus sur base d'un appareil de terrain avec auto-ajustement
Publication
Application
Priority
- EP 96927382 A 19960809
- US 51541095 A 19950815
Abstract (en)
[origin: WO9707444A2] A process control system (100) controls a process (110) through a control output signal (u(t)) based on a set point (YSET) and a measured process variable (y(t)). The process control system (100) includes a control circuit having a set point input, a process variable input and a control output. The control circuit generates the control output signal (u(t)) on the control output as a function of the set point (YSET) received on the set point input and the measured process variable (y(t)) received on the process variable input. An auto-tuning circuit (106) excites the process (110), estimates a process model based on a rising dead time, a rising rate-of-change, a falling dead time and a falling rate-of-change in the measured process variable (y(t)) and then tunes the control function to the process (110) based on the process model. The auto-tuning circuit (106) obtains robust results, but is computationally simple such that the circuit can be implemented with hardware or software in low-power and low-memory applications, such as in field-mounted control units.
IPC 1-7
IPC 8 full level
G05B 13/02 (2006.01); G05B 11/42 (2006.01); G05B 13/04 (2006.01); G05B 23/02 (2006.01)
CPC (source: EP US)
G05B 11/42 (2013.01 - EP US); G05B 13/042 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9707444 A2 19970227; WO 9707444 A3 19980205; BR 9610301 A 19990706; CA 2227545 A1 19970227; CN 1173240 C 20041027; CN 1192813 A 19980909; DE 69617022 D1 20011220; DE 69617022 T2 20020718; DE 69634311 D1 20050310; DE 69634311 T2 20060112; EP 0845118 A2 19980603; EP 0845118 B1 20011114; EP 1122625 A1 20010808; EP 1122625 B1 20050202; JP 3756521 B2 20060315; JP H11510932 A 19990921; US 5691896 A 19971125
DOCDB simple family (application)
US 9613028 W 19960809; BR 9610301 A 19960809; CA 2227545 A 19960809; CN 96196254 A 19960809; DE 69617022 T 19960809; DE 69634311 T 19960809; EP 01110062 A 19960809; EP 96927382 A 19960809; JP 50939297 A 19960809; US 51541095 A 19950815